Results for "Smithsonian Institution Building (Washington, D.C.)"

1. 

   Joseph Henry Electromagnet Equipment - Galvanometer

   • Date: Undated
   • Creator: Unknown

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   Joseph Henry Electromagnet Equipment - Armature

   • Date: Undated
   • Creator: Unknown

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   Joseph Henry Constructs Large Electromagnet for Yale College Professor Benjamin Silliman

   • Date: January 15, 1831

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   Nicholas Hunter Heck (1882-1953)

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   Joseph Henry Electromagnet Equipment - Telegraph Sounder

   • Date: Undated
   • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Suspended Armature

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Commercial Motors

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Suspended Armature

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Commercial Motors

    • Date: Undated
    • Creator: Unknown

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19. 

    Joseph Henry Demonstrates His First Telegraphic Apparatus, a Bell-Ringer

    • Date: 1831-1832

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21. 

    Joseph Henry Electromagnet Equipment - Compound Spiral

    • Date: Undated
    • Creator: Unknown

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23. 

    Joseph Henry Electromagnet Equipment - Ritchie's Motor

    • Date: Undated
    • Creator: Unknown

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